Article
Engineering, Electrical & Electronic
Xiangrong Li, Qiulin Tan, Li Qin, Lei Zhang, Xiaorui Liang, Xiawen Yan
Summary: The study introduced a surface acoustic wave sensor coating with MoS2/GO nano composite, which exhibited high humidity sensitivity and thermal stability. The sensor showed excellent performance at different humidity levels, making it suitable for applications in medical care, environmental monitoring, and cultural relic preservation.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Chemistry, Analytical
Xiangrong Li, Qiulin Tan, Li Qin, Xiawen Yan, Xiaorui Liang
Summary: In this paper, the design of an integrated temperature and strain dual-parameter sensor based on surface acoustic waves (SAWs) is presented. The sensor consists of a temperature-sensitive unit and a strain-sensitive unit, with separate frequencies to avoid interference. The sensor's performance is tested in different temperature and strain ranges, showing high linearity and sensitivity. This sensor has potential applications in closed environments.
Article
Materials Science, Multidisciplinary
Fan Xu, Jiang Yang, Ruizhi Dong, Hanxiao Jiang, Conghuan Wang, Weilin Liu, Zaixiu Jiang, Xiaoqing Zhang, Guodong Zhu
Summary: With the rapid development of technology, converting environmental energies into electrical energy through energy harvesting has become a significant challenge. Research on piezoelectric polymers shows that manufacturing higher-performance 3D wave-shaped piezoelectric devices can be applied in acoustic detection and recognition.
ADVANCED FIBER MATERIALS
(2021)
Article
Crystallography
Rishikesh Srinivasaraghavan Govindarajan, Eduardo Rojas-Nastrucci, Daewon Kim
Summary: Flexible SAW sensors with high piezoelectricity and flexibility are in demand in the aerospace field. This paper discusses the structural, thermal, and electrical properties of the sensor developed using various fillers and polymer matrix, achieving the ability to measure mechanical strains effectively.
Article
Engineering, Electrical & Electronic
Xiangrong Li, Li Qin, Lifeng Guo, Qiulin Tan
Summary: A flexible surface acoustic wave (SAW) strain sensor based on a 100 μm thin langasite substrate is proposed, with a linear strain range of 1-1800 με and strain sensitivity of 44.68 Hz/με at room temperature. The sensor is affected by temperature at a fixed strain, and changes in temperature or strain cause variations in the measured frequency. To accurately measure strain in complex environments, the interference of temperature needs to be eliminated, and the intercept and slope are extracted from the strain-frequency curves at different temperatures for accurate estimation.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Chunxiao Jiao, Chengkai Wang, Meng Wang, Jinghong Pan, Chao Gao, Qi Wang
Summary: With the rapid development of flexible electronic devices in recent years, researchers have become greatly interested in the research of electronic skin (e-skin). This paper introduces a wireless passive e-skin designed based on the surface acoustic wave sensor (SAWS) of lithium niobate piezoelectric film. The e-skin has advantages such as small size, high precision, low power consumption, and good flexibility, making it a sensor platform for a wide range of external stimuli.
Article
Materials Science, Multidisciplinary
Yang Yang, Prince Mengue, Harshad Mishra, Cecile Floer, Sami Hage-Ali, Sebastien Petit-Watelot, Daniel Lacour, Michel Hehn, Tao Han, Omar Elmazria
Summary: A one-port surface acoustic wave (SAW) resonator based on Co-40-Fe-40-B-20/SiO2/ZnO/quartz multilayer structure is investigated as a multifunctional sensor measuring both temperatures and magnetic fields using Rayleigh and Love wave modes. The structure demonstrates high sensitivity to magnetic fields and temperature compensation for accurate measurements.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Engineering, Electrical & Electronic
Jingting Luo, Xiaoying Feng, Hao Kan, Hui Li, Chen Fu
Summary: In this study, a highly sensitive SAW room temperature NO2 gas sensor was successfully developed using one-dimensional Bi2S3 nanobelts as the sensing materials. The sensor showed a response of 2 kHz to 10 ppm NO2 gas and exhibited good selectivity, reversibility, and stability.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Jikai Zhang, Hao Jin, Jinkai Chen, Weipeng Xuan, Rui Ding, Shurong Dong, Jikui Luo
Summary: This paper investigates the temperature effects on SAW strain sensors and proposes a method to eliminate temperature effects. The results show that high temperature causes frequency drift and reduces strain transfer ratio. Accurate high-temperature strain measurements were conducted using the proposed method.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Engineering, Electrical & Electronic
Jian Che, Junsen Wang, Changcang Qiao, Yudong Xia, Kai Ou, Jing Zhou, Yuxiang Ni, Wenting Zhang, Yuchen Han, Xiaotao Zu, Yongqing Fu, Yongliang Tang
Summary: Developing highly sensitive H2S gas sensors has been a critical challenge due to its wide-range application in industry and frequent leakage, which poses a threat to people's safety. In this study, a highly sensitive room-temperature SAW H2S gas sensor based on Si-Cu nanocomposite was developed. The Cu content in the composite layer plays a key role in the H2S response of the sensor, with CuO serving as an excellent adsorption site. The sensor's response to H2S is enhanced by the interaction between CuO and H2S, resulting in the formation of CuS and a negative frequency response.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Materials Science, Multidisciplinary
Marietta Seifert, Barbara Leszczynska, Siegfried Menzel, Thomas Gemming
Summary: This study analyzed the long-term high-temperature behavior of Ti-Al based electrodes and their potential applications in SAW sensor devices. The results showed that the Ti-Al based electrodes remained stable for long-term applications below 500℃ and showed promising feasibility for short- and medium-term applications below 600℃.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Analytical
Chenchen Wang, Yanhong Ding, Mingji Li, Hongji Li, Sheng Xu, Cuiping Li, Lirong Qian, Baohe Yang
Summary: The SAW gas sensor utilizes an Au/TiO2/PEDOT sensing film for quantitative detection of water vapor and CO2, with response ranges of 5%-90% for RH and 500-2000 ppm for CO2. Experimental results demonstrate excellent selectivity, wide response range, rapid response, stability, and repeatability of the sensor.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Analytical
Fu Zheng, Mingji Li, Cuiping Li, Baozeng Zhou, Xiuwei Xuan, Hongji Li
Summary: A wireless humidity sensor based on 433 MHz SAW technology and chitosan/heat-treated cyclo-dextrin (CD)-TiO2 sensitive films was developed. The sensor showed excellent sensitivity to humidity, with linear responses in the humidity ranges of 0%-76% and 76%-90%. The wireless SAW sensor system demonstrated fast response rates to normal air humidity and human respiration, making it suitable for applications such as forest fire early warning and firefighter tracking.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Yang Liu, Edison Huixiang Ang, Xiu Zhong, Hao Lu, Jun Yang, Fei Gao, Chao Yu, Jiawei Zhu, Chengzhang Zhu, Yu Zhou, Fu Yang, Enxian Yuan, Aihua Yuan
Summary: The oxygen vacancy modulation of Fe3O4 nanograins over carbon nanofiber was achieved to improve the electrocatalytic nitrogen reduction reaction (NRR) activity and stability. The optimized catalyst, Fe@CNF-800, exhibited enhanced NH3 yield and rational Faraday efficiency, with 13.6 times atomic activity enhancement compared to commercial Fe3O4. The interfacial effect of assembled nanograins in particles correlated with the formation of oxygen vacancies, promoting the trapping and activation of nitrogen.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Zihang Gao, Yumei Wen, Huaming Lei, Weibiao Wang, Tao Li, Qiang Xiao, Chao Kong, Yanping Fan
Summary: This article presents a passive wireless weighing sensor based on surface acoustic wave (SAW) technology, which has high sensitivity and good ambient temperature inhibition effect.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Kehao Feng, Zhenghua Zhang, Guohua Bai, Xiuyuan Fan, Rongzhi Zhao, Xuefeng Zhang
Summary: This paper proposes a new method to accurately evaluate the high-frequency power loss of soft magnetic materials. Through a two-step calibration, the system is able to compensate for the phase angle discrepancy between the exciting current and induced voltage, enabling a higher power loss measurement frequency.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Mingfang Kang, Tong Liu, Hongmei Sun, Lin Li, Keliang Wang
Summary: In this study, the absorption performance of ambient nitrogenous toxic gases on a monolayer of blue phosphorus phase germanium selenide (GeSe) was investigated using density-functional theory calculations. The results showed that GeSe monolayer exhibits higher sensitivity and selectivity for the hazardous gas NO.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Yaqiong Niu, Zhicheng Zou, Longsheng Cheng, Chaofeng Ye
Summary: This paper proposes a novel method to stabilize the laser diode output using a close-loop control with two feedbacks. The proposed method performs better for long-time operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jiajie Li, Ying Liu, Zhen Chai, Qian Cao, Renjie Li, Yueyang Zhai
Summary: This study proposed an efficient and high-quality beam-splitting method based on a diffractive optical element, enabling multichannel SERF atomic magnetometers to achieve ultra-high consistency and sensitivity. It has significant applications in array biomagnetic measurement systems.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
E. Oliveira, C. Doering, H. Fouckhardt
Summary: With the development of Lab on a chip technology, fluid management using dispersed droplets has become an important approach. Electrowetting on dielectric (EWOD) is one method for droplet actuation, but it requires prior definition of droplet positions. Optoelectrowetting (OEW) goes further by allowing changes in electrical parameters through impinging light spots, without the need for predefined droplet positions. This study re-evaluates the key parameters of OEW and explores their effects on droplet actuation using numerical optimization methods.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Haipeng Wang, Zhiguo Wang, Gancheng Zhu, Shuai Zhang
Summary: A novel capacitive proximity skin was developed to improve the performance of robotics in handling liquid-filled containers. This skin features a flexible structure that can adapt to different grippers and seamlessly integrate with Robot Operating System. Experimental results demonstrated that this proximity skin achieved data-lossless detection and contactless measurement of liquid level, making it suitable for grasping operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Tsenguun Byambadorj, Xiangyu Zhao, Yutao Qin, Yogesh B. Gianchandani
Summary: In this research, a monolithically microfabricated Knudsen pump (KP) without suspended membranes was presented. These pumps offer improved mechanical robustness, wider process window, and simplified microfabrication process compared to previous designs. The experimental results matched the modeling results well, indicating the potential for monolithic integration onto complex lab-on-a-chip systems.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Hamed Karami, Saeed Karami Chemeh, Vahid Azizi, Hooman Sharifnasab, Jose Ramos, Mohammed Kamruzzaman
Summary: Aroma is a significant quality trait for pharmaceutical plants and their products, indicating the quality of the raw material. An electronic nose is an efficient approach for identifying and evaluating the aroma of essential oils. In this study, tarragon was dried at different temperatures and air velocities, and the purity of tarragon essential oil was evaluated using an electronic nose. Multivariate data analysis and artificial neural networks modeling were employed to quantify and classify the obtained essential oils.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Xiaoyang Duan, Dan Xu, Wenjun Jia, Ran Li, Bohao Sun, Ruitian Yan, Wenjie Zhao
Summary: Flower-like WO3/WS2 heterojunction materials constructed via a low-temperature in-situ oxidation method exhibit significant improvements in the detection of NO2 gas in gas sensors, along with good selectivity and reproducibility.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Peng Yu, Mengyang Zhang, Manqi You, Yuxi Gao, Landong Xiao, Yan Peng, Jingxia Lai, Zhouzhao Shi, Siwei Luo, Gencai Guo, Gang Guo
Summary: Recent studies have shown that two-dimensional Janus transition metal dichalcogenides (TMDs) have great potential for applications in gas sensors. By conducting first principles calculations, this study explores the potential application of Pd-doped monolayer HfSeS as gas sensor materials for detecting CO, CO2, NH3, and NO. The results demonstrate the good thermodynamical stability and reversible adsorption of these molecules on both pristine and Pd-doped HfSeS, with Pd-doped HfSeS showing higher sensitivity towards NO due to its metallic behavior upon NO adsorption.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jinlan Yang, Linjiao Li, Jun Huang, Quan Zhang, Hiba Affane
Summary: This study proposes a method for large-scale aggregation of micro-particles by creating a vortex region using low-frequency oscillation. Experimental results show that this method can achieve a large aggregation area and has the advantages of low cost and low power consumption.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jitendra Singh, Saurabh Kumar Gupta, Vinita
Summary: In this investigation, a Surface Acoustic Wave (SAW) formalin gas sensor was explored for low-level formalin gas sensing applications. The sensor showed stable response and high sensitivity to formalin gas concentration, making it a reliable and useful sensor for room temperature operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Junyao Wang, Yahao Liu, Huan Liu, Qi Hou, Jianxin Xu, Hongxu Pan, Jingran Quan, Yansong Chen, Hanbo Yang, Lixiang Li
Summary: A flexible electrode with a serpentine-shaped tetra-chiral structure was designed to improve the mechanical properties and prevent mechanical fracture of flexible electrodes. The research demonstrated that this structure reduced the maximum tensile stress by 87.19% compared to the existing tetra-chiral structure. The flexible electrode remained conductive even at a strain of 70% and showed resistance values of 5 ohm and 4.4 ohm at a bending angle of 180 degrees and after 1000 fold cycles. Furthermore, the flexible electrodes showed great potential in biological signal monitoring, particularly in collecting ECG and pulse signals.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Taihao Chen, Yong Fang, Mengru Zhu, Zhiwei Zhao, Wei Lei, Zhuoya Zhu, Helong Jiang
Summary: Flexible dual-spectral carbon nanodots/flexible n-silicon heterojunction photodetectors with high responsivity and detectivity are reported. These detectors show photo response in UV illumination and only in forward bias under visible illumination. The photocurrent of the device remains high even under bending strain.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
M. S. Sikandar Bathusha, Israr Ud Din, Rehan Umer, Kamran A. Khan
Summary: Graphene-based nanomaterials are used as embedded sensors to monitor fracture behavior in composite structures. This study investigates the in-situ crack propagation and fracture behavior in a glass fiber reinforced polymer composite using embedded reduced graphene oxide coated fabrics and highly conductive graphene nanoplatelet paper.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)